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GB740034A - Improvements in or relating to x-ray apparatus - Google Patents

Improvements in or relating to x-ray apparatus

Info

Publication number
GB740034A
GB740034A GB8293/54A GB829354A GB740034A GB 740034 A GB740034 A GB 740034A GB 8293/54 A GB8293/54 A GB 8293/54A GB 829354 A GB829354 A GB 829354A GB 740034 A GB740034 A GB 740034A
Authority
GB
United Kingdom
Prior art keywords
switch
tube
exposure time
exposure
cathode heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB8293/54A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB740034A publication Critical patent/GB740034A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/46—Combined control of different quantities, e.g. exposure time as well as voltage or current

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)

Abstract

740,034. Control systems for X-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 23, 1954 [March 21, 1953], No. 8293/54. Class 38 (4). In a control system for an X-ray tube 1, particularly one directly fed with A.C., wherein a multi-position exposure-time selecting switch 12 is ganged with a similar switch 11, for automatically varying the cathode heating of the tube (and consequently the lower loading of the tube) in dependence upon the selected exposure time, the connections of the tappings of the timing resistor 21 to the switch 12 and of the tappings of a cathode heating control resistor 10 to the switch 11 are so arranged that, in the range of exposure times corresponding to a few cycles of the A.C. supply, successive differing values of exposure time differ by at least half a cycle and for each such value two or more different values of cathode heating current are available. In the arrangement shown, the shortest exposure time is obtained in any of the first three positions of switch 12, switch 11 providing three different values of tube loading for this exposure time.
GB8293/54A 1953-03-21 1954-03-22 Improvements in or relating to x-ray apparatus Expired GB740034A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL177055A NL88026C (en) 1953-03-21 1953-03-21 roentgen unit with AC power supply for taking roentgen photos with adjustable exposure times

Publications (1)

Publication Number Publication Date
GB740034A true GB740034A (en) 1955-11-09

Family

ID=38528791

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8293/54A Expired GB740034A (en) 1953-03-21 1954-03-22 Improvements in or relating to x-ray apparatus

Country Status (8)

Country Link
US (1) US2835823A (en)
BE (1) BE527176A (en)
CH (1) CH319759A (en)
DE (1) DE975767C (en)
ES (1) ES214270A1 (en)
FR (1) FR1096094A (en)
GB (1) GB740034A (en)
NL (1) NL88026C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163757A (en) * 1960-05-30 1964-12-29 Philips Corp X-ray tube control apparatus
DE3929888A1 (en) * 1989-09-08 1991-03-14 Philips Patentverwaltung X-RAY GENERATOR FOR THE OPERATION OF AN X-RAY TUBE WITH TUBE PARTS CONNECTED TO GROUND

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE672290C (en) * 1933-10-31 1939-02-27 Koch & Sterzel Akt Ges X-ray apparatus with a pre-indicating performance indicator
DE744214C (en) * 1940-01-24 1944-04-19 Koch & Sterzel Ag Device for recording the maximum permissible tube current strength for X-ray apparatus with setting devices for the tube voltage and the number of milliamps
GB571243A (en) * 1942-06-13 1945-08-14 Philips Nv Improvements in and relating to apparatus for controlling the load on an x-ray tube
US2379125A (en) * 1942-07-04 1945-06-26 Westinghouse Electric Corp X-ray tube protective system
US2573029A (en) * 1946-09-12 1951-10-30 Kelley Koett Mfg Company X-ray apparatus

Also Published As

Publication number Publication date
DE975767C (en) 1962-08-23
ES214270A1 (en) 1954-08-01
FR1096094A (en) 1955-06-08
US2835823A (en) 1958-05-20
NL88026C (en) 1958-05-16
CH319759A (en) 1957-02-28
BE527176A (en) 1954-09-11

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